The thyroid gland is composed of $A$ lobes which are located on either side of the $B$. The lobes are interconnected with a thin flap of connective tissue called $C$. Select the correct combination for $A, B$ and $C$.

• A
  $A-3, B-\text{trachea}, C-\text{isthmus}$
• B
  $A-4, B-\text{trachea}, C-\text{isthmus}$
• C
  $A-2, B-\text{trachea}, C-\text{isthmus}$
• D
  $A-1, B-\text{trachea}, C-\text{isthmus}$